﻿class Program
{
    static void Main()
    {
        string source = @"C:\Users\Administrator\Downloads\1.mp4";
        string destination = @"C:\Users\Administrator\Downloads\效果.mp4";  
        
    }

    static void CopyFile(string source, string destination)
    {
        using (FileStream fs = new FileStream(source, FileMode.Open))
        {
            using (FileStream SW = new FileStream(destination, FileMode.OpenOrCreate))
            {
                byte[] buffer = new byte[fs.Length];
                while (true)
                {
                    int read = fs.Read(buffer, 0, buffer.Length);
                    if (read == 0)
                    {
                        break;
                    }
                    SW.Write(buffer, 0, read);
                }
            }
        }
    }
}